Bob Bradley drove the Swansea players "mad" during his time in charge of the club, according to striker Borja Baston.
Bradley lasted only 11 games as Swansea boss last season and was sacked by the club in December after picking up just eight points in the Premier League from a possible 33.
Borja, who joined Swansea from Atletico Madrid last year and departed on loan to Malaga this summer, says the club struggled under Bradley and it was the decision to dismiss him for Paul Clement that enabled them to stay up.
"I arrived with an arm injury that I had picked up at Atletico, and just when I was recovering I had a small problem with my quadriceps," he told AS.